What does flattening a PDF mean?

Flattening converts interactive elements — such as form fields, checkboxes, and annotations — into static page content. The values are preserved visually but can no longer be edited.

Can I unflatten a PDF after flattening?

No. Flattening is irreversible. Once flattened, the interactive fields cannot be restored. Keep your original file before flattening.

Does it handle AcroForm fields?

Yes. Standard AcroForm fields — text inputs, checkboxes, radio buttons, dropdowns — are merged into the page as static content.

Does it also flatten annotations?

Yes. Annotations such as comments, highlights, and stamps are merged into the page along with form fields.

Are my files kept private?

Yes. All flattening happens locally in your browser. Your PDF is never sent to any server.

Flatten PDF — Flatten Form Fields and Annotations Online Free | Toolivon

Flatten PDF — Lock Form Fields

Convert interactive form fields and annotations to static content so the PDF cannot be edited.

Your files never leave your browser. All processing happens locally.

Flattening removes interactive form fields and annotations, converting them to static content.

Drop a PDF to flatten

or click to browse — max 100 MB

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How to Flatten a PDF

1
Upload your PDF
Drop the PDF with form fields or annotations onto the upload zone, or click to browse.
2
Click Flatten
The tool merges all interactive form fields and annotations into the static page content in your browser.
3
Download the flattened PDF
The resulting PDF has no editable fields — all content is now permanently embedded in the page.

Frequently Asked Questions

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